Product Description
General
As the epitome of outdoor high-voltage protection, the drop-out fuse and pull load drop-out fuse are expertly designed to safeguard electric systems. These fuses, placed strategically on the high-voltage side of distribution transformers or within distribution lines, offer unparalleled defense against short circuits and overloads. Their sophisticated design includes an insulating bracket and fuse tubes; static contacts are securely fastened at each end of the insulation bracket, while moving contacts rest at the extremities of the fuse tube. Ingeniously constructed, the fuse tube features an inner arc tube, encapsulated by an outer phenolic paper tube or an epoxy glass cloth tube. Engineered for superior operational performance, the pull load drop-out fuse is equipped with advanced auxiliary contacts and an arc chute, ensuring maximum flexibility and efficiency in handling open or co-load currents.
In routine operations, the drop-out fuse remains in a closed position, keeping the fuse tube and fuse firmly in place. Upon a system fault, the fault current quickly melts the fuse, creating an arc. This arc generates intense heat that expels gas from the arc tube, increasing the tube's internal pressure. This action initiates a controlled vertical airflow along the pipeline, expertly stretching and elongating the arc. As the fuse link melts, the tension holding the moving contact is released, activating the locking mechanism, which subsequently frees the fuse tube, moving it into the open position. For load disconnection, an insulating rod is used to detach the moving contact, initially keeping it connected with the static contact. Continued pulling with the insulating rod causes the auxiliary contacts to disengage, forming and elongating an arc within the hood slit. The arc cover releases gas, effectively extinguishing the arc when the current reaches zero.
Use and Standards
This remarkable product is ingeniously crafted for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It excels as a fortress of protection against overloads and short circuits, while deftly managing the separation and connection of rated load currents.
In strict adherence to top-tier standards, the product model complies with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is meticulously crafted to meet the rigorous requirements of GB15166.3-1994 high voltage fuses expulsion fuses standards. In cases where standards ambiguously specify essential parameters and configurations, precision adjustments are made according to JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology.
Drop-out fuse cutouts and load switching fuse cutouts are indispensable for outdoor high voltage protection. Seamlessly integrated into the incoming feeder of distribution transformers or distribution lines, they provide crucial defense against short circuits and overloads, effectively managing on/off loading currents. The drop-out fuse cutout features insulate insulator supports and a fuse tube; static contacts are securely positioned on either side of the insulator support, and moving contacts are located at the ends of the fuse tube. The intricate design of the fuse tube includes an inner arc-extinguishing tube, enveloped by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is equipped with robust elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring proficient management of on-off loading currents.
Under standard operating conditions, the fuse link ensures the secure closure of the fuse tube. When faults arise, fault currents rapidly melt the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing a significant amount of gas. This high pressure propels the arc along the tube. Once the fuse link melts, the moving contact loses tension, triggering the mechanism to lock, and the fuse tube drops out, transitioning the cutout to an open state. To disconnect during cutout loading, operators use an insulating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling disengages the auxiliary contacts, generating an electric arc that elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas, ensuring the arc is extinguished as the current hits zero.
Product Parameters
| Typ |
Rated Volatge (kv) |
Rated Current (A) |
Breaking current (kA) |
Impulse voltage (BIL) |
Power-frequency withstand voltage |
Leakage distance (mm) |
Weight (kg) |
| UD-1 |
12 |
100 |
6.3 |
110 |
40 |
250 |
5.8 |
| UD-1 |
12 |
200 |
8 |
110 |
40 |
250 |
5.8 |
| UD-2 |
15 |
100 |
10 |
125 |
45 |
320 |
6.9 |
| UD-2 |
15 |
200 |
12 |
125 |
45 |
320 |
6.9 |
| UD-3 |
24 |
100 |
8 |
150 |
65 |
530 |
10 |
| UD-3 |
24 |
200 |
10 |
150 |
65 |
530 |
10 |
| UD-4 |
15 |
100 |
10 |
125 |
45 |
350 |
4.15 |
| UD-4 |
15 |
200 |
12 |
125 |
45 |
350 |
4.15 |
| UD-5 |
12 |
100 |
6.3 |
110 |
40 |
250 |
6.3 |
| UD-5 |
12 |
200 |
8 |
110 |
40 |
250 |
6.3 |
| UD-6 |
15 |
100 |
10 |
125 |
45 |
320 |
10 |
| UD-6 |
15 |
200 |
12 |
125 |
45 |
320 |
10 |
| UD-7 |
24 |
100 |
8 |
150 |
65 |
540 |
10 |
| UD-7 |
24 |
200 |
10 |
150 |
65 |
540 |
10 |
| UD-7(F) |
33 |
200 |
12 |
170 |
70 |
720 |
4.4 |
| UD-8 |
33 |
100 |
10 |
170 |
70 |
720 |
11.6 |
| UD-8 |
33 |
200 |
12 |
170 |
70 |
720 |
11.6 |
Main product
Company Profile
Zhejiang ChaoTai Complete Equipment Co., Ltd. stands as a beacon of excellence within the dynamic world of electrical integration. Esteemed as a prestigious high-tech enterprise, we are passionately devoted to groundbreaking innovation, empowered by a distinguished team that excels across R&D, production, and service. With over 15 years of invaluable experience, we are not just participating in the industry; we are revolutionizing it, setting new and unparalleled standards of excellence that inspire.
Our diverse product range exemplifies our unwavering commitment to supreme quality and excellence. It features premium high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, and cutting-edge gas-insulated switchgear. We provide state-of-the-art substations, diligently tailored to fulfill the myriad needs of diverse industries. From the dynamic energy and chemical sectors to robust metal smelting processes and expansive electric power grids, our innovative solutions redefine industry capabilities. Our advanced offerings are also crucial to industrial manufacturing, esteemed universities, pioneering research entities, and the thriving medical and pharmaceutical sectors. In municipal commerce, water conservancy and hydropower, road traffic systems, as well as an extensive array of commercial and residential areas, our products deliver unmatched reliability and efficiency, setting new benchmarks in trust and performance.
At Zhejiang ChaoTai, our steadfast dedication to technological innovation and a visionary 'smart manufacturing' philosophy propels us to attract the finest technical talent. This drives us to enhance our core competitiveness, delivering unmatched value to our clients while solidifying our stature as an industry leader. From modest beginnings, we've embarked on an extraordinary journey of growth, embracing a contemporary business model that thrives on quality, market foresight, and efficiency through meticulous management. Our ethos is deeply rooted in prioritizing technology, adhering to standardized management, delivering exceptional quality, and ensuring customer satisfaction. With integrity as our foundation, quality as our fortitude, and customer satisfaction as our unwavering mission, we aim to excel, innovate, and build a brand that inspires trust. With heartfelt gratitude, we thank all our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we are poised to craft a brighter future, hand in hand, forging an exciting path of innovation and excellence!
Our Advantages
Certifications
After Sales Service
FAQ
Q1. Are you a factory or trading company?
A.We are a factory.
Q2. Where is your factory located? How can I visit there?
A. Our factory is located in Wenzhou City, Zhejiang Province, China. You can fly to Longwan airport directly. All our clients,from home or abroad, are warmly welcome to visit us!
Q3. What's the payment term?
A. We accept TT. 30% deposit and 70% before shipment, Western Union, L/C At Sight is ok! We'll l show you the photos of the products and packages before you pay the balance.
Q4. Tell me the standard of package? What is your terms of packing?
A: Generally, we pack our goods in neutral white boxes and brown cartons, If vou have leaallyl registered patent, we can pack the goods in your branded boxes after getting your authorization letters.
Q5. Would you accept to use our logo?
A. If you have good quantity,it absolute no problem to do OEM.
Q6. How about the transport?
A. If the number of aoods is small we usually use TNT.DHL.FEDEX.EMS and some express voull offered. If the number of the goods is big usually we use the FWD you offered or we provided. Either by sea or by air is OK.
Q7. What is your Production lead time /delivery time?
A: Generally, it will take 25 to 30 days after receivina vour advance payment.
The specificl delivery time depends on the items and the quantity of your order. Silicone rubber's reqular product is 1,000/ week, Porcelain's need 2-3 weeks about 1000 pcs.
Q8. How do you make our business long-term and good relationship?
A:l. We keep aood auality and competitive price to ensure our customers benefit:
A: 2. We respect every customer as our friend and we sincerely do business and make friendsl with them, no matter where they come from.
A: 3.Most goods we have the type report according the IEC STANDARD
Q9. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the courier cost.
Q10. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
Q11. What is your terms of delivery?
A: EXW, FOB, CFR, CIF.
Q12.What certificates do you have?
A:ISO9001,OHSAS18001,ISO14001 certificate and Type test report of product.
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